EADST

C++: Load Raw Data and Convert to Float Pointer

 #include  < fstream>
#include  < iostream>
#include  < opencv.hpp>

using namespace std;
using namespace cv;  


int main() {
    string file_path = "./test.raw";
    ifstream fin;
    fin.open(file_path,  std::ios::binary);
    if (!fin) {
        cerr << "open failed: " << file_path << endl;
        return -1;
    }
    fin.seekg(0, fin.end);
    int length = fin.tellg();
    fin.seekg(0, fin.beg);
    char* buffer = new char[length];
    fin.read(buffer, length);
    // convert to float pointer
    float *tmp = (float *)buffer;

    // convert to mat
    int rows = 32;
    int cols = 128;
    Mat m(rows, cols, CV_8UC3);
    Vec3b p;
    for (int i = 0; i < rows; i++)
    {
        for (int j = 0; j < cols; j++)
        {
            p[0] = tmp[0 * rows * cols + i * cols + j];
            p[1] = tmp[1 * rows * cols + i * cols + j];
            p[2] = tmp[2 * rows * cols + i * cols + j];
            m.at(i,j) = p;
        }
     }
    cout << "============M:=================" << endl << m << endl;
    return 0;
}

References：

Mat Introduction